User:Luizchang
APDOO/OZTNO on Leica M
Useful Leitz screw mount accessory adaptor to be used on a Leica M camera
OZTNO adaptor
(This picture is from smorhun.com)
The Leitz OZTNO/14088 (1955) release adaptor allows the use of attachments designed for screw mount cameras to be used with Leica M cameras. Such as the example below, shown a post-war delayed action timer (self timer) model APDOO/14003 (1938-1965) attached to a Leica M Camera via an OZTNO adaptor. The APDOO self timer can be adjusted deliberately to allow the waiting time before camera's shutter is released in the range of 10 to 15 seconds as you wish.
APDOO+OZTNO on a Leica M camera
(This picture is from smorhun.com)
The seldom found Leitz OZTNO adaptor (at least three variations in engraving known) is designed for using screw Leitz cable release on M cameras and the often found APDOO delayed action timer is originally used on screw mount cameras that haven’t equipped with built-in self timer. These two antique things happened to fit each other perfectly and can be used together on a Leica M camera without built-in self timer (eg. M4-2, M4-P, M6, M6 TTL, M7, MP...etc).
Note: Some Leica M users try very hard to find the OZTNO adaptors on eBay but are often disappointed unexpectedly to realize that the combinations of APDOO/OZTNO they have bought do not seem to function well on their M cameras (especially the later models like MP) and think the problem might be that perhaps the camera’s shutter release socket is far recessed. But I think the real problem might be on the OZTNO adaptor itself, not APDOO or camera. After trying a few OZTNO adaptors on each of my M camera (M4-P, M6 TTL, M7, MP, MP 3 LHSA) carefully I finally conclude that some OZTNO adaptors simply cannot not be screwed deeply enough to release camera’s shutter due to their original design or manufacturing tolerance. Although I have no idea about how to adjust the OZTNO adaptor properly in order to make it screwed deeply enough into the camera shutter release socket, I just use an easier method instead to get around the adjustment problem but can still make it to release camera's shutter in an interesting way. This is illustrated below and it seems to function quite well. Hope this illustration would be helpful to those who found their APDOO/OZTNO combinations couldn’t work successfully on their M cameras.
APDOO+OZTNO on a Leica MP 3 LHSA with simple adjustment
